UV-328 / Tinuvin 328 / Eversorb 74 CAS 25973-55-1

Product name: UV Absorber UV-328

Chemical Name:2-(2H-benzotriazol-2-yl)-4,6-ditertpentylphenol

Synonym:Eversorb 74;GSTAB 328;Tinuvin 328

Cas No.: 25973-55-1

MF: C22H29N3O

Purity: ≥99%(HPLC)

Category:

UV-328 Application scenarios

1. Polyolefin Products:

Used in polyethylene (PE), polypropylene (PP), etc., such as films, pipes, injection molded parts, and fibers, to prevent photoaging, yellowing, and embrittlement, extending outdoor service life.

2. Polyvinyl Chloride (PVC) Products:

Suitable for rigid and flexible PVC, such as building profiles, pipes, films, and cable sheaths, improving weather resistance and inhibiting degradation and performance decline caused by ultraviolet radiation.

3. Engineering Plastics and General-Purpose Plastics:

Applicable to polystyrene (PS), ABS resin, polycarbonate (PC), polyesters, unsaturated resins, polyamide (PA), etc., preventing discoloration and cracking, and maintaining mechanical properties and appearance stability.

4. Coatings and Inks:

Added to automotive coatings, industrial coatings, wood coatings, and printing inks to prevent coating gloss loss, chalking, and blistering, enhancing outdoor durability and extending coating service life.

5. Adhesives and Sealants:

Used in various adhesives and sealing materials to improve their weather resistance and prevent UV-induced reduction in bonding strength and aging degradation.

6. Polyurethane (PU) Products:

Applied to thermoplastic polyurethane, PU foam, synthetic leather, etc., preventing yellowing and aging, and maintaining elasticity and appearance texture.

7. Rubber Products:

Used in natural rubber and synthetic rubber, such as rubber seals, conveyor belts, and outdoor rubber products, to delay photoaging and extend service life.

8. Textiles and Leather:

Used in the finishing of textiles and leather, providing fabrics and leather with UV resistance, reducing UV damage to the materials, and improving durability.

Description

UV-328 / Tinuvin 328 / Eversorb 74 CAS 25973-55-1

Appearance Light yellow crystalline powder
Content ≥99%(HPLC)
Melting point 79-87℃
Ash ≤0.1%
Volatile ≤0.5%
Transmittance 460nm≥96%,500nm≥97%

 

Application:

1. This product is a high-efficiency ultraviolet absorber, which can effectively absorb ultraviolet light with a wavelength of 270-340 nanometers.
2. The light stabilization performance is similar to UV-326 and UV-327, but this product has good compatibility with resin, low thermal volatilization, and high washing resistance.
3. Mainly used for polyolefin (especially polyethylene), polyester, styrenic polymer, polyamide, polymethyl methacrylate, polycarbonate, elastomer and other polymers.

Suggested addition:

Polystyrene Polyethylene Polyester Polycarbonate Polyvinyl chloride
0.2-0.5% 0.2-0.4% 0.3-0.5% 0.15-0.3% 0.2-0.5%

 

 

 

Storage:
Being kept in dry, clean warehouse with well ventilation.
Avoid exposing to light and heating for prevention of oxidation.
Protecting the product from leakage, rain and insolation during transportation.

 

Contact Us Now!

If you need COA, MSDS or TDS of UV Absorber, please fill in your contact information in the form below, we will usually contact you within 24 hours. You could also email me info@longchangchemical.com during working hours ( 8:30 am to 6:00 pm UTC+8 Mon.~Sat. ) or use the website live chat to get prompt reply.

Contact US

English